Influence of Cobalt Additive on Mechanical Properties and Residual Stress of Al₂O₃-TiC Ceramic Cutting Tool Material

Abstract:

Cobalt additive was added into the Al₂O₃-TiC composite to improve the mechanical properties. The microstructure and fracture mode of composite tool materials Al₂O₃-TiC and Al₂O₃-TiC-Co were investigated, emphasizing on the difference of thermal residual stress distribution with added cobalt. The interfacial thermal stress and the stress distribution in each phase were worked out according to thermoelasticity theory. The results demonstrated that cobalt could strengthen the interfacial bonding strength of ceramic grains and influence the residual stress distribution in Al₂O₃ matrix, which change the fracture mode and lead to the flexural and irregular crack propagation path.

• Periodical: Advanced Materials Research (Volume 500)
• Pages: 657-661
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.500.657
• Online since: April 2012
• Authors: Zeng Bin Yin, Chuan Zhen Huang, Bin Zou, Han Lian Liu, Hong Tao Zhu, Jun Wang
• Keywords: Ceramic, Composite, Mechanical Property, Microstructure, Thermal Expansion

References

[1] M.Y. Lee, M.P. Borom: Adv. Ceram. Mater. 3 (1998), p.38.

[2] T.D. Xia, Z.A. Munir and Y.L. Tang: J. Am. Ceram. Soc. 83 (2000), p.507.

[3] L.S. Sigl, P.A. Mataga and B.J. Dalgleish: Acta Metal. 36 (1988), p.945.

[4] D.S. Mao, X.H. Liu and J. Li, J. Mater. Sci. 33 (1998), p.5677.

[5] J. Li, L.P. Ma: Ceram. Int. 31(2005), p.945.

[6] J. Li., D.S. Mao: Acta Metal. Sin. 34 (1998), p.332.

[7] J. Li, J.L. Sun and L.P. Huang: Mater. Sci. Eng. A. 323 (2002), p.17.

[8] J.H. Gong, H.Z. Miao and Z. Zhao: J. Eur. Soc. 21 (2001), p.2377.

[9] M.S. Zheng, Z.H. Jin and H.Q. Hao: Sci. China (A). 24 (1994), p.1333.

[10] Z.L. Xu: Elasticity Mechanics, (Higher Education Publications, Beijing 1990).